Refer to the paragraph on scarlet gilia. What is the significance of measuring fruit production?
A) It is a measure of pollination success.
B) It is a measure of seed dispersal success.
C) It is easier than counting flowers.
D) It is an indication of predation on the seeds of the plants.
A
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Which type of receptor is used by an owl to visually detect the movement of prey?
a. mechanoreceptors b. photoreceptors c. chemoreceptors d. thermoreceptors e. nociceptors
The characteristic that makes the muscle cells unique is the relative abundance and organization of
A. fibroblast cells. B. actin and myosin fibers. C. gelatinous mass. D. keratin fibers. E. collagen fibers.
The figure illustrates
a. a pyramid of energy. b. a pyramid of biomass. c. a grazing food web. d. a detrital food web. e. the recycling of energy in an ecosystem.
Free radicals can be damaging because they are _____.
a) unstable b) highly reactive c) radioactive d) both unstable and highly reactive